1,438 research outputs found
Reaction Rates and Nuclear Properties Relevant for Nucleosynthesis in Massive Stars and Far From Stability
Explosive nuclear burning in astrophysical environments produces unstable
nuclei which again can be targets for subsequent reactions. In addition, it
involves a large number of stable nuclides which are not fully explored by
experiments, yet. Thus, it is necessary to be able to predict reaction cross
sections and thermonuclear rates with the aid of theoretical models. Such
predictions are also of interest for investigations at radioactive ion beam
facilities. An extended library of theoretical cross sections and reaction
rates is presented. The problem of alpha+nucleus potentials is addressed and
new parametrizations presented. The problem of properly predicting cross
sections at low level densities is illustrated by the 62Ni(n,gamma) reaction.Comment: 7 pages, invited talk, to appear in proceedings of CGS11 (Prague),
World Scientific (new version: fixed typo in potential parameters; note: they
will still be incorrect in the printed version
Experimentelle Bestimmung der stellaren (n,γ)-Querschnitte von ¹⁴⁸Sm und ¹⁵⁰Sm und die Konsequenzen fuer den s-Prozess
ENDF-6 compatible evaluation of neutron induced reaction cross sections for 182,183,184,186W
An ENDF-6 compatible evaluation for neutron induced reactions in the resonance region has been completed for 182,183,184,186W. The parameters are the result of an analysis of experimental data available in the literature together with a parameter adjustment on transmission and capture data obtained at the time-of-flight facility GELINA. Complete evaluated data files in ENDF-6 format have been produced by joining the evaluations in the resonance region with corresponding files from the JEFF-32T1 and ENDF/B-VII.1 library. The evaluated files have been processed with the latest updates of NJOY.99 to test their format and application consistency as well as to produce a continuous-energy data library in ACE format for use in Monte Carlo codes. The evaluated files will be implemented in the next release of the JEFF-3 library which is maintained by the Nuclear Energy Agency of the OECD. The evaluated files will be implemented in the next release of the JEFF-3 library which is maintained by the Nuclear Energy Agency of the OECD.JRC.D.4-Standards for Nuclear Safety, Security and Safeguard
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